U.S. patent application number 13/274507 was filed with the patent office on 2012-05-10 for gear driven coupling between ultrasonic transducer and waveguide in surgical instrument.
Invention is credited to Timothy G. Dietz, Kevin L. Houser, Cory G. Kimball, Matthew C. Miller, Foster B. Stulen, John W. Willis.
Application Number | 20120116263 13/274507 |
Document ID | / |
Family ID | 66810611 |
Filed Date | 2012-05-10 |
United States Patent
Application |
20120116263 |
Kind Code |
A1 |
Houser; Kevin L. ; et
al. |
May 10, 2012 |
GEAR DRIVEN COUPLING BETWEEN ULTRASONIC TRANSDUCER AND WAVEGUIDE IN
SURGICAL INSTRUMENT
Abstract
A surgical instrument is separable into a transducer unit and a
lower body portion. The lower body portion includes a waveguide and
a casing. The transducer unit includes a transducer and a geared
mechanism operable to couple the transducer to the waveguide. In
some versions the geared mechanism includes bevel gears coupled to
a rack and pinion such that linear motion may be used to rotatably
couple a transducer to a waveguide. The rack gear may further
include a handle extending out of the transducer unit casing to be
actuatable by a user. The rack gear may also be flexible or rigid.
In other versions, the bevel gears may be coupled to a threaded
shaft that is operable to translate the transducer into the
waveguide to form an interference fit. The transducer unit may also
include a slide lock mechanism to couple to the casing of the lower
body portion.
Inventors: |
Houser; Kevin L.;
(Springboro, OH) ; Miller; Matthew C.;
(Cincinnati, OH) ; Kimball; Cory G.; (Cincinnati,
OH) ; Willis; John W.; (Cincinnati, OH) ;
Dietz; Timothy G.; (Terrace Park, OH) ; Stulen;
Foster B.; (Mason, OH) |
Family ID: |
66810611 |
Appl. No.: |
13/274507 |
Filed: |
October 17, 2011 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
61410603 |
Nov 5, 2010 |
|
|
|
61487846 |
May 19, 2011 |
|
|
|
Current U.S.
Class: |
601/2 |
Current CPC
Class: |
A61B 2017/00017
20130101; A61B 2018/00607 20130101; A61B 2018/126 20130101; A61B
90/40 20160201; A61B 90/08 20160201; A61B 2017/00084 20130101; A61B
2017/00398 20130101; A61B 2050/005 20160201; A61B 2050/0067
20160201; H01M 10/425 20130101; A61B 2017/00482 20130101; A61B
2017/00221 20130101; H02J 7/025 20130101; A61B 2017/294 20130101;
A61B 2018/00988 20130101; A61B 2090/0807 20160201; A61B 18/1445
20130101; A61B 2018/00702 20130101; A61B 2018/00791 20130101; G16H
20/40 20180101; H01M 10/46 20130101; A61B 18/04 20130101; A61B
2017/320069 20170801; A61B 2018/1226 20130101; Y10T 29/49895
20150115; A61B 2017/00477 20130101; A61B 2017/0084 20130101; A61B
2017/2929 20130101; A61B 2018/00595 20130101; A61B 2018/1253
20130101; A61B 2017/00473 20130101; A61B 2017/293 20130101; A61B
2090/502 20160201; Y02E 60/10 20130101; A61B 2017/320094 20170801;
H01M 50/531 20210101; A61B 2090/0803 20160201; A61B 2017/0046
20130101; A61B 2017/320095 20170801; G16H 40/63 20180101; H02J
7/0045 20130101; H02J 7/0048 20200101; A61B 17/320068 20130101;
A61B 50/30 20160201; A61B 2017/291 20130101; A61B 2017/2933
20130101; A61B 2017/320071 20170801; A61B 17/320092 20130101; A61B
18/1206 20130101; A61B 2034/2048 20160201; H02J 7/0044 20130101;
A61B 18/1442 20130101; A61B 18/1233 20130101; A61B 2018/00589
20130101; Y10T 29/49005 20150115; A61B 17/00234 20130101; A61B
17/285 20130101; A61B 2017/00119 20130101; A61B 2050/3008 20160201;
A61B 2090/0814 20160201; A61B 17/064 20130101; A61B 34/25 20160201;
A61B 2018/1455 20130101; A61B 2017/00128 20130101; A61B 2050/0076
20160201; A61B 2050/3007 20160201; A61B 2018/0019 20130101; A61B
18/12 20130101; H02J 7/0047 20130101; Y10T 29/53913 20150115; A61B
18/00 20130101; A61B 46/10 20160201; A61B 2017/2931 20130101; A61B
2018/00178 20130101; A61B 17/2812 20130101; A61B 2018/00601
20130101; H01M 50/20 20210101; A61B 18/14 20130101; A61B 2018/1412
20130101; A61B 2090/372 20160201; A61B 2017/00734 20130101; H01M
2220/30 20130101; A61B 2017/00022 20130101; A61N 7/00 20130101;
A61B 2090/0813 20160201; A61B 2050/008 20160201; A61B 2034/254
20160201; A61B 2050/0065 20160201; H01M 10/48 20130101 |
Class at
Publication: |
601/2 |
International
Class: |
A61N 7/00 20060101
A61N007/00 |
Claims
1. A surgical instrument comprising: (a) a lower body portion
comprising: i. a body casing, and ii. a waveguide extending
distally from the body casing; and (b) a transducer unit
comprising: i. a transducer casing, ii. a transducer, and iii. a
geared assembly operable to rotate or translate the transducer
relative to the transducer casing; wherein the geared mechanism is
operable to selectively couple the transducer to the waveguide.
2. The surgical instrument of claim 1 wherein the geared mechanism
comprises a plurality of bevel gears and a shaft, wherein the shaft
is coupled to the transducer and coupled to at least one of the
plurality of bevel gears.
3. The surgical instrument of claim 2 wherein at least one bevel
gear of the plurality of bevel gears is coupled to a pinion
gear.
4. The surgical instrument of claim 3 further comprising a rack
gear, wherein the pinion gear engages the rack gear, wherein the
rack gear is translatable relative to the pinion gear.
5. The surgical instrument of claim 4 wherein the rack gear is
flexible.
6. The surgical instrument of claim 4 wherein the rack gear is
rigid.
7. The surgical instrument of claim 4 further comprising a handle
coupled to a distal end of the rack gear and a slot formed in the
transducer unit casing, wherein a portion of the handle extends
through the slot, and wherein the handle is translatable relative
to the slot.
8. The surgical instrument of claim 2 wherein the shaft comprises
threading, wherein the transducer comprises a proximal threaded
recess complementary to the threading of the shaft, and wherein the
shaft is operable to translate the transducer relative to the
shaft.
9. The surgical instrument of claim 8 wherein the transducer is
selectively coupleable to the waveguide by an interference
fitting.
10. The surgical instrument of claim 2 wherein the waveguide
comprises threading formed on a proximal end of the waveguide,
wherein the transducer comprises a horn having a threaded recess
complementary to the threading of the waveguide, wherein the shaft
is fixedly coupled to the transducer, and wherein the shaft is
operable to thread the threading of the waveguide into the threaded
recess of the transducer.
11. The surgical instrument of claim 2 wherein the wherein the
shaft is fixedly coupled to the transducer, and wherein the shaft
is operable to rotate the transducer relative to the transducer
casing.
12. The surgical instrument of claim 11 wherein the waveguide
comprises a male connector at a proximal end of the waveguide,
wherein the transducer comprises a female recess formed in a distal
end and configured to receive the male connector, and wherein the
shaft is operable to rotate the transducer having the female recess
about the male connector to selectively couple the transducer to
the waveguide.
13. The surgical instrument of claim 11 wherein the waveguide
comprises an elliptic cylinder projection at a proximal end,
wherein the transducer comprises an ovular recess formed in a
distal end and configured to receive the elliptic cylinder
projection, and wherein the shaft is operable to rotate the
transducer when the elliptic cylinder is within ovular recess.
14. The surgical instrument of claim 1 wherein the transducer unit
is coupleable to the lower body portion.
15. The surgical instrument of claim 1 wherein the transducer unit
comprises a slide lock assembly, wherein the lower body portion
comprises a slider recess formed in the body casing, and wherein
the slide lock assembly is operable to selectively couple the
transducer unit to the lower body portion via insertion into the
slider recess.
16. An ultrasonic transmission assembly comprising: (a) an
ultrasonic transducer assembly having a distal end; (b) a waveguide
assembly having a proximal end; and (c) non-threaded means for
coupling the proximal end of the waveguide assembly to the distal
end of the ultrasonic transducer assembly to provide acoustic
continuity between the ultrasonic transducer assembly and the
waveguide assembly.
17. The ultrasonic transmission assembly of claim 16 wherein the
non-threaded means for coupling comprises a first member extending
from the proximal end of the waveguide assembly and a receptacle
formed in the distal end of the ultrasonic transducer assembly,
wherein the first member is insertable into the receptacle.
18. The ultrasonic transmission assembly of claim 16 wherein the
non-threaded means for coupling is operable to secure the waveguide
assembly to the ultrasonic transducer assembly in a first
orientation.
19. A surgical instrument comprising: (a) a lower body assembly
comprising: i. a body casing having a slider recess formed in a
portion of the body casing, and ii. a waveguide extending distally
from the body casing; and (b) a transducer unit comprising: i. a
transducer, ii. a transducer casing, and iii. a slide lock assembly
translatable relative to the transducer casing and operable to
selectively couple to the slider recess.
20. The surgical instrument of claim 19 wherein the waveguide
comprises a shaft and a ball, wherein the shaft extends from a
proximal end of the waveguide, wherein the ball is coupled to a
proximal end of the shaft, and wherein the transducer comprises a
cup feature configured to receive the ball and shaft.
Description
PRIORITY
[0001] This application claims priority to U.S. Provisional
Application Ser. No. 61/410,603, filed Nov. 5, 2010, entitled
"Energy-Based Surgical Instruments," the disclosure of which is
incorporated by reference herein.
[0002] This application also claims priority to U.S. Provisional
Application Ser. No. 61/487,846, filed May 19, 2011, entitled
"Energy-Based Surgical Instruments," the disclosure of which is
incorporated by reference herein.
BACKGROUND
[0003] In some settings, endoscopic surgical instruments may be
preferred over traditional open surgical devices since a smaller
incision may reduce the post-operative recovery time and
complications. Consequently, some endoscopic surgical instruments
may be suitable for placement of a distal end effector at a desired
surgical site through a cannula of a trocar. These distal end
effectors may engage tissue in a number of ways to achieve a
diagnostic or therapeutic effect (e.g., endocutter, grasper,
cutter, stapler, clip applier, access device, drug/gene therapy
delivery device, and energy delivery device using ultrasound, RF,
laser, etc.). Endoscopic surgical instruments may include a shaft
between the end effector and a handle portion, which is manipulated
by the clinician. Such a shaft may enable insertion to a desired
depth and rotation about the longitudinal axis of the shaft,
thereby facilitating positioning of the end effector within the
patient.
[0004] Examples of endoscopic surgical instruments include those
disclosed in U.S. Pat. Pub. No. 2006/0079874, entitled "Tissue Pad
for Use with an Ultrasonic Surgical Instrument," published Apr. 13,
2006, the disclosure of which is incorporated by reference herein;
U.S. Pat. Pub. No. 2007/0191713, entitled "Ultrasonic Device for
Cutting and Coagulating," published Aug. 16, 2007, the disclosure
of which is incorporated by reference herein; U.S. Pat. Pub. No.
2007/0282333, entitled "Ultrasonic Waveguide and Blade," published
Dec. 6, 2007, the disclosure of which is incorporated by reference
herein; U.S. Pat. Pub. No. 2008/0200940, entitled "Ultrasonic
Device for Cutting and Coagulating," published Aug. 21, 2008, the
disclosure of which is incorporated by reference herein; U.S. Pat.
Pub. No. 2011/0015660, entitled "Rotating Transducer Mount for
Ultrasonic Surgical Instruments," published Jan. 20, 2011, the
disclosure of which is incorporated by reference herein; U.S. Pat.
No. 6,500,176, entitled "Electrosurgical Systems and Techniques for
Sealing Tissue," issued Dec. 31, 2002, the disclosure of which is
incorporated by reference herein; and U.S. Pat. Pub. No.
2011/0087218, entitled "Surgical Instrument Comprising First and
Second Drive Systems Actuatable by a Common Trigger Mechanism,"
published Apr. 14, 2011, the disclosure of which is incorporated by
reference herein. Additionally, such surgical tools may include a
cordless transducer such as that disclosed in U.S. Pat. Pub. No.
2009/0143797, entitled "Cordless Hand-held Ultrasonic Cautery
Cutting Device," published Jun. 4, 2009, the disclosure of which is
incorporated by reference herein. In addition, the surgical
instruments may be used, or adapted for use, in robotic-assisted
surgery settings such as that disclosed in U.S. Pat. No. 6,783,524,
entitled "Robotic Surgical Tool with Ultrasound Cauterizing and
Cutting Instrument," issued Aug. 31, 2004.
[0005] While several systems and methods have been made and used
for surgical instruments, it is believed that no one prior to the
inventors has made or used the invention described in the appended
claims.
BRIEF DESCRIPTION OF THE DRAWINGS
[0006] While the specification concludes with claims which
particularly point out and distinctly claim this technology, it is
believed this technology will be better understood from the
following description of certain examples taken in conjunction with
the accompanying drawings, in which like reference numerals
identify the same elements and in which:
[0007] FIG. 1 depicts a perspective view of an exemplary surgical
system having a surgical instrument and a generator;
[0008] FIG. 2 depicts a top plan view of an exemplary transducer
assembly and waveguide assembly coupled together via a V-shaped
slot interface;
[0009] FIG. 3 depicts a front elevation view of the transducer of
FIG. 2 showing a V-shaped female slot;
[0010] FIG. 4 depicts a rear partial perspective view of the
waveguide of FIG. 2 showing a V-shaped male connector;
[0011] FIG. 5 depicts a top cross-sectional view of an exemplary
alternative transducer assembly and waveguide assembly coupled
together via a rotatable ovular interface;
[0012] FIG. 6 depicts a front elevation view of the transducer of
FIG. 5 showing an ovular aperture and an offset cylindrical
recess;
[0013] FIG. 7 depicts a rear partial perspective view of the
waveguide of FIG. 5; showing an ovular male connector;
[0014] FIG. 8 depicts a front elevation view of a transducer
assembly of an exemplary alternative rotatable ovular interface
showing an ovular recess;
[0015] FIG. 9 depicts a rear partial perspective view of a
waveguide assembly of the rotatable ovular interface of FIG. 8
showing an elliptic cylinder;
[0016] FIG. 10 depicts a top cross-sectional view of another
exemplary transducer assembly and waveguide assembly configured to
couple together via an interference fit interface;
[0017] FIG. 11 depicts a side elevation view of yet another
exemplary transducer assembly and waveguide assembly coupled
together via a ball joint interface;
[0018] FIG. 12 depicts a front elevation view of the transducer of
FIG. 11 showing a ball shaft portion, a ball cup, and an arcuate
slot portion;
[0019] FIG. 13 depicts a rear partial perspective view of the
waveguide of FIG. 11 showing a ball connector;
[0020] FIG. 14 depicts a rear partial perspective view of an
exemplary alternative waveguide assembly having an asymmetric shaft
for use with the transducer of FIG. 12;
[0021] FIG. 15 depicts a side elevation view of an exemplary
alternative ball joint interface having cammed ends;
[0022] FIG. 16 depicts a top plan view of an exemplary transducer
unit with a portion of the casing removed and showing a transducer,
a rack gear, a pinion gear, and a plurality of bevel gears for
rotating the transducer;
[0023] FIG. 17A depicts a side elevation view of an exemplary lower
handle portion and the transducer unit of FIG. 16 showing the rack
gear and pinion gear for coupling the transducer to an exemplary
waveguide;
[0024] FIG. 17B depicts a side elevation view of the lower handle
portion and transducer unit of FIG. 17A showing the transducer unit
coupled to the lower handle portion;
[0025] FIG. 17C depicts a side elevation view of the lower handle
portion and transducer unit of FIG. 17A showing the rack gear
actuated distally and the transducer coupled to the waveguide;
and
[0026] FIG. 18 depicts a side elevation view of an exemplary
transducer unit having a slide lock assembly to couple the
transducer unit to an exemplary lower handle portion.
[0027] The drawings are not intended to be limiting in any way, and
it is contemplated that various embodiments of the technology may
be carried out in a variety of other ways, including those not
necessarily depicted in the drawings. The accompanying drawings
incorporated in and forming a part of the specification illustrate
several aspects of the present technology, and together with the
description serve to explain the principles of the technology; it
being understood, however, that this technology is not limited to
the precise arrangements shown.
DETAILED DESCRIPTION
[0028] The following description of certain examples of the
technology should not be used to limit its scope. Other examples,
features, aspects, embodiments, and advantages of the technology
will become apparent to those skilled in the art from the following
description, which is by way of illustration, one of the best modes
contemplated for carrying out the technology. As will be realized,
the technology described herein is capable of other different and
obvious aspects, all without departing from the technology.
Accordingly, the drawings and descriptions should be regarded as
illustrative in nature and not restrictive.
[0029] I. Overview of Exemplary Ultrasonic Surgical System
[0030] FIG. 1 shows an exemplary ultrasonic surgical system (10)
comprising an ultrasonic surgical instrument (50), a generator
(20), and a cable (30) coupling generator (20) to surgical
instrument (50). In some versions, generator (20) comprises a GEN
300 sold by Ethicon Endo-Surgery, Inc. of Cincinnati, Ohio. By way
of example only, generator (20) may be constructed in accordance
with the teachings of U.S. Pub. No. 2011/0087212, entitled
"Surgical Generator for Ultrasonic and Electrosurgical Devices,"
published Apr. 14, 2011, the disclosure of which is incorporated by
reference herein. While surgical instrument (50) is described
herein as an ultrasonic surgical instrument, it should be
understood that the teachings herein may be readily applied to a
variety of surgical instruments, including but not limited to
endocutters, graspers, cutters, staplers, clip appliers, access
devices, drug/gene therapy delivery devices, and energy delivery
devices using ultrasound, RF, laser, etc., and/or any combination
thereof as will be apparent to one of ordinary skill in the art in
view of the teachings herein. Moreover, while the present example
will be described in reference to a cable-connected surgical
instrument (50), it should be understood that surgical instrument
(50) may be adapted for cordless operation, such as that disclosed
in U.S. Pat. Pub. No. 2009/0143797, entitled "Cordless Hand-held
Ultrasonic Cautery Cutting Device," published Jun. 4, 2009, the
disclosure of which is incorporated by reference herein. For
instance, surgical device (50) may include an integral and portable
power source such as a battery, etc. Furthermore, surgical device
(50) may also be used, or adapted for use, in robotic-assisted
surgery settings such as that disclosed in U.S. Pat. No. 6,783,524,
entitled "Robotic Surgical Tool with Ultrasound Cauterizing and
Cutting Instrument," issued Aug. 31, 2004.
[0031] Surgical instrument (50) of the present example includes a
multi-piece handle assembly (60), an elongated transmission
assembly (70), and a transducer (100). Transmission assembly (70)
is coupled to multi-piece handle assembly (60) at a proximal end of
transmission assembly (70) and extends distally from multi-piece
handle assembly (60). In the present example, transmission assembly
(70) is configured as an elongated, thin tubular assembly for
endoscopic use, but it should be understood that transmission
assembly (70) may alternatively be a short assembly, such as those
disclosed in U.S. Pat. Pub. No. 2007/0282333, entitled "Ultrasonic
Waveguide and Blade," published Dec. 6, 2007, and U.S. Pat. Pub.
No. 2008/0200940, entitled "Ultrasonic Device for Cutting and
Coagulating," published Aug. 21, 2008, the disclosures of which are
incorporated by reference herein. Transmission assembly (70) of the
present example comprises an outer sheath (72), an inner tubular
actuating member (not shown), a waveguide (not shown), and an end
effector (80) located on the distal end of transmission assembly
(70). In the present example, end effector (80) comprises a blade
(82) that is mechanically and acoustically coupled to the
waveguide, a clamp arm (84) operable to pivot at the proximal end
of transmission assembly (70), and a clamp pad (86) coupled to
clamp arm (84).
[0032] In some versions, transducer (100) comprises a plurality of
piezoelectric elements (not shown) that are compressed between a
first resonator (not shown) and a second resonator (not shown) to
form a stack of piezoelectric elements. The piezoelectric elements
may be fabricated from any suitable material, for example, lead
zirconate-titanate, lead meta-niobate, lead titanate, and/or any
suitable piezoelectric crystal material, for example. Transducer
(100) further comprises electrodes, including at least one positive
electrode and at least one negative electrode, that are configured
to create a voltage potential across the one or more piezoelectric
elements, such that the piezoelectric elements convert the
electrical power into ultrasonic vibrations. When transducer (100)
of the present example is activated, transducer (100) is operable
to create linear oscillations or vibrations at an ultrasonic
frequency (such as 55.5 kHz). When transducer (100) is coupled to
transmission assembly (70), these linear oscillations are
transmitted through the internal waveguide of transmission assembly
(70) to end effector (80). In the present example, with blade (82)
being coupled to the waveguide, blade (82) thereby oscillates at
the ultrasonic frequency. Thus, when tissue is secured between
blade (82) and clamp arm (84), the ultrasonic oscillation of blade
(82) may simultaneously sever the tissue and denature the proteins
in adjacent tissue cells, thereby providing a coagulative effect
with relatively little thermal spread. An electrical current may
also be provided through blade (82) and clamp arm (84) to cauterize
the tissue. One merely exemplary suitable ultrasonic transducer
(100) is Model No. HP054, sold by Ethicon Endo-Surgery, Inc. of
Cincinnati, Ohio, though it should be understood that any other
suitable transducer may be used. It should also be understood that
clamp arm (84) and associated features may be constructed and
operable in accordance with at least some of the teachings of U.S.
Pat. No. 5,980,510, entitled "Ultrasonic Clamp Coagulator Apparatus
Having Improved Clamp Arm Pivot Mount," issued Nov. 9, 1999, the
disclosure of which is incorporated by reference herein.
[0033] Multi-piece handle assembly (60) of the present example
comprises a mating housing portion (62) and a lower portion (64).
Mating housing portion (62) defines a cavity within multi-piece
handle assembly (60) and is configured to receive transducer (100)
at a proximal end of mating housing portion (62) and to receive the
proximal end of transmission assembly (70) at a distal end of
mating housing portion (62). A rotation knob (66) is shown in the
present example to rotate transmission assembly (70) and transducer
(100), but it should be understood that rotation knob (66) is
merely optional. Lower portion (64) of multi-piece handle assembly
(60) shown in FIG. 1 includes a trigger (68) and is configured to
be grasped by a user using a single hand. One merely exemplary
alternative version for lower portion (64) is depicted in FIG. 1 of
U.S. Pat. Pub. No. 2011/0015660, entitled "Rotating Transducer
Mount for Ultrasonic Surgical Instruments," published Jan. 20,
2011, the disclosure of which is incorporated by reference herein.
In some versions toggle buttons are located on a distal surface of
lower portion (64) and are operable to selectively activate
transducer (100) at different operational levels using generator
(20). For instance, a first toggle button may activate transducer
(100) at a maximum energy level while a second toggle button may
activate transducer (100) at a minimum, non-zero energy level. Of
course, the toggle buttons may be configured for energy levels
other than a maximum and/or minimum energy level as will be
apparent to one of ordinary skill in the art in view of the
teachings herein. Furthermore, any other number of toggle buttons
may be provided.
[0034] While multi-piece handle assembly (60) has been described in
reference to two distinct portions (62, 64), it should be
understood that multi-piece handle assembly (60) may be a unitary
assembly with both portions (62, 64) combined. Multi-piece handle
assembly (60) may alternatively be divided into multiple discrete
components, such as a separate trigger portion (operable either by
a user's hand or foot) and a separate mating housing portion (62).
Such a trigger portion may be operable to activate transducer (100)
and may be remote from mating housing portion (62). Multi-piece
handle assembly (60) may be constructed from a durable plastic
casing (61) (such as polycarbonate or a liquid crystal polymer),
ceramics, metals and/or any other suitable material as will be
apparent to one of ordinary skill in the art in view of the
teachings herein. Other configurations for multi-piece handle
assembly (60) will also be apparent to those of ordinary skill in
the art in view of the teachings herein. For instance, in some
versions trigger (68) may be omitted and surgical instrument (50)
may be activated by a controlled of a robotic system. In other
versions, surgical instrument (50) may be activated when coupled to
generator (20).
[0035] Further still, surgical instrument (50) may be constructed
in accordance with at least some of the teachings of U.S. Pat. No.
5,322,055 entitled "Clamp Coagulator/Cutting System for Ultrasonic
Surgical Instruments," issued Jun. 21, 1994, the disclosure of
which is incorporated by reference herein; U.S. Pat. No. 5,873,873
entitled "Ultrasonic Clamp Coagulator Apparatus Having Improved
Clamp Mechanism," issued Feb. 23, 1999, the disclosure of which is
incorporated by reference herein; U.S. Pat. No. 5,980,510, entitled
"Ultrasonic Clamp Coagulator Apparatus Having Improved Clamp Arm
Pivot Mount," filed Oct. 10, 1997, the disclosure of which is
incorporated by reference herein; U.S. Pat. No. 6,325,811 entitled
"Blades with Functional Balance Asymmetries for use with Ultrasonic
Surgical Instruments," issued Dec. 4, 2001, the disclosure of which
is incorporated by reference herein; U.S. Pub. No. 2006/0079874
entitled "Tissue Pad for Use with an Ultrasonic Surgical
Instrument," published Apr. 13, 2006, the disclosure of which is
incorporated by reference herein; U.S. Pub. No. 2007/0191713
entitled "Ultrasonic Device for Cutting and Coagulating," published
Aug. 16, 2007, the disclosure of which is incorporated by reference
herein; U.S. Pub. No. 2007/0282333 entitled "Ultrasonic Waveguide
and Blade," published Dec. 6, 2007, the disclosure of which is
incorporated by reference herein; U.S. Pub. No. 2008/0200940
entitled "Ultrasonic Device for Cutting and Coagulating," published
Aug. 21, 2008, the disclosure of which is incorporated by reference
herein; U.S. Pub. No. 2009/0143797, entitled "Cordless Hand-held
Ultrasonic Cautery Cutting Device," published Jun. 4, 2009, the
disclosure of which is incorporated by reference herein; U.S. Pub.
No. 2010/0069940 entitled "Ultrasonic Device for Fingertip
Control," published Mar. 18, 2010, the disclosure of which is
incorporated by reference herein; U.S. Pub. No. 2011/0015660,
entitled "Rotating Transducer Mount for Ultrasonic Surgical
Instruments," published Jan. 20, 2011, the disclosure of which is
incorporated by reference herein; and/or U.S. Provisional
Application Ser. No. 61/410,603, filed Nov. 5, 2010, entitled
"Energy-Based Surgical Instruments," the disclosure of which is
incorporated by reference herein.
[0036] It is further understood that any one or more of the
teachings, expressions, embodiments, examples, etc. described
herein may be combined with any one or more of the other teachings,
expressions, embodiments, examples, etc. that are described herein.
The following-described teachings, expressions, embodiments,
examples, etc. should therefore not be viewed in isolation relative
to each other. Various suitable ways in which the teachings herein
may be combined will be readily apparent to those of ordinary skill
in the art in view of the teachings herein. Such modifications and
variations are intended to be included within the scope of the
claims.
[0037] II. Exemplary Waveguide-Transducer Interfaces
[0038] In some instances it may be useful to selectively couple a
waveguide and/or a horn to transducer (100) via an interface. For
instance, in some situations it may desirable to reuse the
electrical components of transducer (100), such as the
piezoelectric elements, while disposing of the mechanical
components that may be rendered unclean during a procedure. Such
configurations may permit transducer (100) to be secured within
multi-piece handle assembly (60) while only the waveguide and horn
are decoupleable via the interface. Alternatively, transducer (100)
may be contained in a transducer unit that may be coupleable to a
handle assembly. In such instances, the waveguide and horn may be
secured to the handle assembly and transducer (100) may be coupled
to the waveguide and horn via the interface when the transducer
unit is coupled to the handle assembly. Accordingly, various
interfaces for coupling a waveguide to transducer (100) will be
described below.
[0039] A. Exemplary V-Shaped Slot Interface
[0040] FIGS. 2-4 depict an exemplary V-shaped slot interface (200)
for coupling a transducer assembly (210) to a waveguide assembly
(250). Referring initially to FIG. 2, transducer assembly (210)
comprises a plurality of piezoelectric elements (212) that are
compressed between a first resonator (214) and a second resonator
(220) to form a stack of piezoelectric elements. Piezoelectric
elements (212) may be fabricated from any suitable material, for
example, lead zirconate-titanate, lead meta-niobate, lead titanate,
and/or any other suitable piezoelectric crystal material.
Transducer assembly (210) further comprises electrodes (not shown),
including at least one positive electrode and at least one negative
electrode, that are configured to create a voltage potential across
piezoelectric elements (212), such that piezoelectric elements
(212) convert the electrical power into ultrasonic vibrations. In
some versions the electrodes are coupled to a power source (not
shown) that is external to a handle assembly (not shown) in which
transducer assembly (210) is contained. In other versions, the
power source may be contained within the handle assembly such that
transducer assembly (210), the handle assembly, and the power
source form a single reusable and/or reclaimable assembly. The
ultrasonic vibrations produced by transducer assembly (210) are
transmittable to a blade (not shown) via waveguide assembly (250),
as will be described below. In the present example, first resonator
(214) comprises a V-shaped female slot (230) formed in a distal end
of first resonator (214). As shown in FIG. 3, V-shaped female slot
(230) comprises a web channel (232) and a sector portion (234)
(shown in phantom). Web channel (232) is a substantially vertical
slot formed in a distal face (216) of first resonator (214) while
sector portion (234) is a sector shaped recess that is offset from
a distal face (216) of first resonator (214) by a distance d shown
in FIG. 2. Of course other configurations for transducer assembly
(210) will be apparent to one of ordinary skill in the art in view
of the teachings herein.
[0041] Referring back to FIG. 2, waveguide assembly (250) includes
a waveguide portion (252) and a horn portion (254). In the present
example waveguide portion (252) and horn portion (254) are integral
parts forming a monolithic waveguide assembly (250). It should be
understood that in some versions horn portion (254) and waveguide
portion (252) may also be separable, though this is merely
optional. Of course, it should be understood that horn (254) may be
integral with transducer assembly (210) such that waveguide
assembly (250) selectively couples with horn (254). Such coupling
of horn (254) to waveguide assembly (250) may incorporate any of
the interfaces described herein. In the present example, horn
portion (254) comprises a cylindrical section having a proximal
face (256) and a flared section extending distally from the
cylindrical section. Waveguide portion (252) comprises an elongate
rod extending distally from the flared section of horn portion
(254). In some versions waveguide assembly (250) may be made from
titanium, though it should be understood that other metals may be
used, including steel, aluminium, brass, etc. Horn portion (254)
further comprises a V-shaped male connector (260), shown in FIG. 4.
V-shaped male connector (260) comprises a web (262) and a sector
(264). Web (262) extends proximally from proximal face (256) of
horn portion (254) and is configured to fit in web channel (232) of
V-shaped female slot (230). Sector (264) is formed on a proximal
end of Web (262) and is configured to fit in sector portion (234)
of V-shaped female slot (230). In some versions, web (262) extends
proximally for a distance less than distance d, shown in FIG. 2,
such that insertion of V-shaped male connector (260) into V-shaped
female slot (230) creates a tight fit. Furthermore, waveguide
assembly (250) may be included in a transmission assembly, such as
transmission assembly (70) described above. Still further
alternative versions for waveguide assembly (250) will be apparent
to one of ordinary skill in the art in view of the teachings
herein.
[0042] As shown in FIG. 2, transducer assembly (210) interfaces
with waveguide assembly (250) at distal face (216) of first
resonator (214) and proximal face (256) of horn portion (254). The
proximal face (256)-distal face (216) longitudinal interface may be
predetermined to substantially correspond to an antinode of the
ultrasonic vibration wave produced by transducer assembly (210). An
antinode is a point where the displacement due to the ultrasonic
vibration wave is at a maximum. Alternatively, the antinode may be
longitudinally located at the interface of the proximal face of
sector (264) and the distal face of sector portion (234). Further
still, the antinode may instead be longitudinally located in web
(262) or in sector (264). Of course the antinode need not
necessarily be located at any of these locations. In some versions
the interface may correspond to a node, a point where the
displacement due to the ultrasonic vibration wave is at zero, at
any of the foregoing locations. In yet other versions, the
interface may be located anywhere between a node and an
antinode.
[0043] Initially, waveguide assembly (250) and transducer assembly
(210) are decoupled, as shown separately in FIGS. 3-4. To couple
waveguide assembly (250) to transducer assembly (210), the user
vertically aligns V-shaped male connector (260) with V-shaped
female slot (230). The user then slides V-shaped male connector
(260) into V-shaped female slot (230), thereby coupling waveguide
assembly (250) to transducer assembly (210). In some instances,
V-shaped female slot (230) may retain V-shaped male connector (260)
therein via a friction fit, a snap fit, detents, and/or any other
connection mechanism as will be apparent to one of ordinary skill
in the art in view of the teachings herein. The user may then use
the assembled transducer and waveguide for further assembly of a
surgical instrument, or, if the surgical instrument is fully
assembled, the user may utilize the surgical instrument for a
procedure. To decouple waveguide assembly (250) and transducer
assembly (210), the user slides V-shaped male connector (260) out
of V-shaped female slot (230). Waveguide assembly (250) may then be
disposed of, cleaned, resterilized, and/or otherwise. Transducer
assembly (210) may be reused, cleaned, reclaimed, and/or otherwise
as well. Thus, a user may dispose of the unclean mechanical
components of waveguide assembly (250) while recycling the
electrical components of transducer assembly (210).
[0044] Of course other configurations for V-shaped slot interface
(200) will be apparent to one of ordinary skill in the art in view
of the teachings herein. For instance, V-shaped male connector
(260) and V-shaped female slot (230) may be inverted, and
transducer assembly (210) may be coupled to transducer unit (800)
described below in section IV and shown in FIG. 18.
[0045] B. Exemplary Rotatable Ovular Interface
[0046] FIGS. 5-7 depict an exemplary rotatable ovular interface
(300) for coupling a transducer assembly (310) to a waveguide
assembly (350). Referring initially to FIG. 5, transducer assembly
(310) comprises a plurality of piezoelectric elements (312) that
are compressed between a first resonator (314) and a second
resonator (320) to form a stack of piezoelectric elements.
Piezoelectric elements (312) may be fabricated from any suitable
material, for example, lead zirconate-titanate, lead meta-niobate,
lead titanate, and/or any other suitable piezoelectric crystal
material. Transducer assembly (310) further comprises electrodes
(not shown), including at least one positive electrode and at least
one negative electrode, that are configured to create a voltage
potential across piezoelectric elements (312), such that
piezoelectric elements (312) convert the electrical power into
ultrasonic vibrations. In some versions the electrodes are coupled
to a power source (not shown) that is external to a handle assembly
(not shown) in which transducer assembly (310) is contained. In
other versions, the power source may be contained within the handle
assembly such that transducer assembly (310), the handle assembly,
and the power source form a single reusable and/or reclaimable
assembly. The ultrasonic vibrations produced by transducer assembly
(310) are transmittable to a blade (not shown) via waveguide
assembly (350), as will be described below. In the example shown in
FIG. 6, first resonator (314) comprises an ovular aperture (330)
formed through a distal face (316) of first resonator (314) and a
cylindrical recess (332) (shown in phantom) located proximally of
ovular aperture (330). Cylindrical recess (332) is offset from
distal face (316) of first resonator (314) by a distance d shown in
FIG. 5 and has a diameter substantially equal to the major axis
diameter of ovular aperture (330). While the present example
includes an ovular aperture (330), it should be understood that
other shapes and sizes for aperture (330) may be used. For
instance, a rectangular aperture, a T-shaped aperture, a triangular
aperture, an S-shaped aperture, an egg shaped aperture, an
irregularly shaped aperture, and/or any other asymmetrical aperture
may be used. Of course other configurations for transducer assembly
(310) will be apparent to one of ordinary skill in the art in view
of the teachings herein.
[0047] Referring back to FIG. 5, waveguide assembly (350) includes
a waveguide portion (352) and a horn portion (354). In the present
example waveguide portion (352) and horn portion (354) are integral
parts forming a monolithic waveguide assembly (350). It should be
understood that in some versions horn portion (354) and waveguide
portion (352) may also be separable, though this is merely
optional. Of course, it should be understood that horn portion
(354) may be integral with transducer assembly (310) such that
waveguide assembly (350) selectively couples with horn portion
(354). Such coupling of horn portion (354) to waveguide assembly
(350) may incorporate any of the interfaces described herein. In
the present example, horn portion (354) comprises a cylindrical
section having a proximal face (356) and a flared section extending
distally from the cylindrical section. Waveguide portion (352)
comprises an elongate rod extending distally from the flared
section of horn portion (354). In some versions waveguide assembly
(350) may be made from titanium, though it should be understood
that other metals may be used, including steel, aluminium, brass,
etc. Horn portion (354) further comprises an ovular male connector
(360), shown in FIG. 7. Ovular male connector (360) comprises a web
(362) and an elliptic disc (364). Web (362) extends proximally from
proximal face (356) of horn portion (354). Elliptic disc (364) is
formed on a proximal end of web (362) and is configured to be
insertable through ovular aperture (330) and into cylindrical
recess (332). In some versions, web (362) extends proximally for a
distance less than distance d, shown in FIG. 5, such that insertion
and subsequent rotation of elliptic disc (364) through ovular
aperture (330) and into cylindrical recess (332) creates tight fit.
Furthermore, waveguide assembly (350) may be included in a
transmission assembly, such as transmission assembly (70) described
above. Still further alternative versions for waveguide assembly
(350) will be apparent to one of ordinary skill in the art in view
of the teachings herein.
[0048] As shown in FIG. 5, transducer assembly (310) interfaces
with waveguide assembly (350) at distal face (316) of first
resonator (314) and proximal face (356) of horn portion (354). The
proximal face (356)-distal face (316) longitudinal interface may be
predetermined to substantially correspond to an antinode of the
ultrasonic vibration wave produced by transducer assembly (310). An
antinode is a point where the displacement due to the ultrasonic
vibration wave is at a maximum. Alternatively, the antinode may be
longitudinally located at the interface of the proximal face of
elliptic cylinder (364) and the distal face of cylindrical recess
(332). Further still, the antinode may instead be longitudinally
located in shaft (362) or in elliptic cylinder (364). Of course the
antinode need not necessarily be located at any of these locations.
In some versions the interface may correspond to a node, a point
where the displacement due to the ultrasonic vibration wave is at
zero, at any of the foregoing locations. In yet other versions, the
interface may be located anywhere between a node and an
antinode.
[0049] Initially, waveguide assembly (350) and transducer assembly
(310) are decoupled, as shown separately in FIGS. 6-7. To couple
waveguide assembly (350) to transducer assembly (310), the user
inserts elliptic cylinder (364) through ovular aperture (330) and
into cylindrical recess (332). The user then rotates waveguide
assembly (350) such that elliptic cylinder (364) is no longer
aligned with ovular aperture (330), thereby coupling waveguide
assembly (350) to transducer assembly (310). By way of example
only, the user may rotate waveguide assembly (350) by 90 degrees,
or a one-quarter turn. Of course any other suitable rotational
angles may be used in the present example. If an asymmetrical
component is used instead of elliptic cylinder (364), rotational
angles greater than 0 and less than 360 may be used. In some
instances, cylindrical recess (332) may retain elliptic cylinder
(364) therein via a friction fit, a snap fit, detents, and/or any
other connection mechanism as will be apparent to one of ordinary
skill in the art in view of the teachings herein. Such connection
mechanisms may be operable to maintain waveguide assembly (350) in
a predetermined orientation relative to transducer assembly (310).
The user may then use the assembled transducer and waveguide for
further assembly of a surgical instrument, or, if the surgical
instrument is fully assembled, the user may utilize the surgical
instrument for a procedure. To decouple waveguide assembly (350)
and transducer assembly (310), the user rotates waveguide assembly
(350) until elliptic cylinder (364) is aligned with ovular aperture
(330). In some versions, waveguide assembly (350) and/or transducer
assembly (310) may have indicators (not shown), such as visual
markings, to indicate when elliptic cylinder (364) and ovular
aperture (330) are aligned. With elliptic cylinder (364) and ovular
aperture (330) aligned, the user pulls waveguide assembly (350)
distally to decouple waveguide assembly (350) from transducer
assembly (310). Waveguide assembly (350) may then be disposed of,
cleaned, resterilized, and/or otherwise. Transducer assembly (310)
may be reused, cleaned, reclaimed, and/or otherwise as well. Thus,
a user may dispose of the unclean mechanical components of
waveguide assembly (350) while recycling the electrical components
of transducer assembly (310). Of course other configurations for
rotatable ovular interface (300) will be apparent to one of
ordinary skill in the art in view of the teachings herein.
[0050] FIG. 8 shows an exemplary alternative transducer assembly
(370) comprising an ovular recess (376) formed in a distal face
(374) of first resonator (372). Ovular recess (376) of the present
example has a major axis of diameter d1 and a minor axis of
diameter d2. As shown, d1 is slightly larger than d2. By way of
example only, d1 may be approximately 0.255 and d2 may be
approximately 0.250. FIG. 9 shows an exemplary alternative
waveguide assembly (380) comprising a waveguide portion (not shown)
and a horn portion (382). Horn portion (382) comprises an elliptic
cylinder (386) projecting proximally from a proximal face (384) of
horn portion (382). Elliptic cylinder (386) also has a major axis
of diameter d1 and a minor axis of diameter d2, where d1 is
slightly larger than d2. In the present example, d1 of elliptic
cylinder (386) is substantially equal to d1 of ovular recess (376)
and d2 of elliptic cylinder (386) is substantially equal to d2 of
ovular recess (376).
[0051] Initially, waveguide assembly (380) and transducer assembly
(370) are decoupled, as shown separately in FIGS. 8-9. To couple
waveguide assembly (380) to transducer assembly (380), the user
aligns and inserts elliptic cylinder (386) into ovular recess
(376). The user then rotates waveguide assembly (380) such that
elliptic cylinder (386) frictionally fits in ovular recess (376),
thereby coupling waveguide assembly (380) to transducer assembly
(370). As will be appreciated by one of ordinary skill in the art,
when elliptic cylinder (386) is rotated 90 degrees, or a quarter
turn, major axis of elliptic cylinder (386) having a diameter d1
forms a frictional fit within minor axis of ovular recess (376)
having a slightly smaller diameter d2. Of course other rotational
angles may be possible as well to form a frictional fit. The user
may then use the assembled transducer and waveguide for further
assembly of a surgical instrument, or, if the surgical instrument
is fully assembled, the user may utilize the surgical instrument
for a procedure. To decouple waveguide assembly (380) and
transducer assembly (370), the user rotates waveguide assembly
(380) until the major axis of elliptic cylinder (386) is aligned
with the major axis of ovular recess (376). In some versions,
waveguide assembly (380) and/or transducer assembly (370) may have
indicators (not shown), such as visual markings, to indicate when
elliptic cylinder (386) and ovular recess (376) are aligned. With
elliptic cylinder (386) and ovular recess (376) aligned, the user
pulls waveguide assembly (380) distally to decouple waveguide
assembly (380) from transducer assembly (370). Waveguide assembly
(380) may then be disposed of, cleaned, resterilized, and/or
otherwise. Transducer assembly (370) may be reused, cleaned,
reclaimed, and/or otherwise as well. Thus, a user may dispose of
the unclean mechanical components of waveguide assembly (380) while
recycling the electrical components of transducer assembly
(370).
[0052] While the foregoing example described the frictional fit in
relation to elliptic cylinder (386) and ovular recess (376), other
rotationally asymmetric configurations may be used as well.
[0053] C. Exemplary Interference Fit Interface
[0054] FIG. 10 depicts an exemplary interference fit interface
(400) for coupling a transducer assembly (410) to a waveguide
assembly (450). Transducer assembly (410) comprises a plurality of
piezoelectric elements (412) that are compressed between a first
resonator (414) and a second resonator (420) to form a stack of
piezoelectric elements. Piezoelectric elements (412) may be
fabricated from any suitable material, for example, lead
zirconate-titanate, lead meta-niobate, lead titanate, and/or any
other suitable piezoelectric crystal material. Transducer assembly
(410) further comprises electrodes (not shown), including at least
one positive electrode and at least one negative electrode, that
are configured to create a voltage potential across piezoelectric
elements (412), such that piezoelectric elements (412) convert the
electrical power into ultrasonic vibrations. In some versions the
electrodes are coupled to a power source (not shown) that is
external to a handle assembly (not shown) in which transducer
assembly (410) is contained. In other versions, the power source
may be contained within the handle assembly such that transducer
assembly (410), the handle assembly, and the power source form a
single reusable and/or reclaimable assembly. The ultrasonic
vibration produced by transducer assembly (410) are transmittable
to a blade (not shown) via waveguide assembly (450), as will be
described below. As shown in the example in FIG. 10, first
resonator (414) comprises a cylindrical recess (418) formed in a
distal face (416) of first resonator (414). Recess (418) of the
present example has a diameter d1. While the present example
includes a cylindrical recess (418), it should be understood that
other shapes and/or sizes for recess (418) may be used. For
instance, a cuboid recess, an elliptic cylindrical recess, and/or
any other shaped recess may be used. Of course other configurations
for transducer assembly (410) will be apparent to one of ordinary
skill in the art in view of the teachings herein.
[0055] Waveguide assembly (450) includes a waveguide portion (452)
and a horn portion (454). In the present example waveguide portion
(452) and horn portion (454) are integral parts forming a
monolithic waveguide assembly (450). It should be understood that
in some versions horn portion (454) and waveguide portion (452) may
also be separable, though this is merely optional. Of course, it
should be understood that horn portion (454) may be integral with
transducer assembly (410) such that waveguide assembly (450)
selectively couples with horn portion (454). Such coupling of horn
portion (454) to waveguide assembly (450) may incorporate any of
the interfaces described herein. In the present example, horn
portion (454) comprises a cylindrical section having a proximal
face (456) and a flared section extending distally from the
cylindrical section. Waveguide portion (452) comprises an elongate
rod extending distally from the flared section of horn portion
(454). In some versions waveguide assembly (450) may be made from
titanium, though it should be understood that other metals may be
used, including steel, aluminium, brass, etc. Horn portion (454) of
the present example further comprises a cylindrical pin (458)
having a diameter d2. Cylindrical pin (458) extends proximally from
proximal face (456) of horn portion (454). As shown in FIG. 10, the
diameter d2 of cylindrical pin (458) is slightly larger than
diameter d1 of cylindrical recess (418) of first resonator (414).
Cylindrical pin (458) is configured to be insertable into
cylindrical recess (418) despite this size diametric size
differential, as will be discussed below. In some versions,
waveguide assembly (450) may have a recess and transducer assembly
(410) may have a pin. Furthermore, waveguide assembly (450) may be
included in a transmission assembly, such as transmission assembly
(70) described above. Still further alternative versions for
waveguide assembly (450) will be apparent to one of ordinary skill
in the art in view of the teachings herein.
[0056] As shown in FIG. 10, transducer assembly (410) interfaces
with waveguide assembly (450) at distal face (416) of first
resonator (414) and proximal face (456) of horn portion (454). The
proximal face (456)-distal face (416) longitudinal interface may be
predetermined to substantially correspond to an antinode of the
ultrasonic vibration wave produced by transducer assembly (410). An
antinode is a point where the displacement due to the ultrasonic
vibration wave is at a maximum. Alternatively, the antinode may be
longitudinally located at the interface of the proximal face
cylindrical pin (458) and the distal face of cylindrical recess
(418). Further still, the antinode may instead be longitudinally
located within cylindrical pin (458). Of course the antinode need
not necessarily be located at any of these locations. In some
versions the interface may correspond to a node, a point where the
displacement due to the ultrasonic vibration wave is at zero, at
any of the foregoing locations. In yet other versions, the
interface may be located anywhere between a node and an
antinode.
[0057] When a user desires to couple waveguide assembly (450) to
transducer assembly (410), initially the user aligns cylindrical
pin (458) with cylindrical recess (418). In some versions, the user
activates transducer assembly (410) and the oscillations produced
by transducer assembly (410) at first resonator (414) may cause the
matrix of molecules of first resonator (414) to expand and/or
contract according to Poisson's ratio. Such expansion and/or
contraction may permit a user to insert cylindrical pin (458) into
cylindrical recess (418). In other versions, the oscillations
produced by transducer assembly (410) may thermally heat first
resonator (414), thereby softening and/or potentially expanding
cylindrical recess (418) to permit insertion of cylindrical pin
(458) therein. Once transducer assembly (410) is deactivated, an
interference fit is formed between cylindrical pin (458) and
cylindrical recess (418) due to the diametric difference between d1
and d2. Alternatively, waveguide assembly (450) and/or cylindrical
pin (458) may be super-cooled, such as through the use of dry ice,
liquid nitrogen, refrigeration, or other temperature reducing
means, to shrink cylindrical pin (458) for insertion into
cylindrical recess (418). Once cylindrical pin (458) heats back up,
an interference fit is formed between cylindrical pin (458) and
cylindrical recess (418) due to the diametric difference between d1
and d2. Of course users may super-cool waveguide assembly (450)
and/or transducer assembly (410) and thermally heat the other. In
still other versions the user may simply be able to force
cylindrical pin (458) into cylindrical recess (418) without
activating transducer assembly (410) to frictionally fit waveguide
assembly (450) to transducer assembly (410). Of course other
methods for producing an interference fit between cylindrical pin
(458) and cylindrical recess (418) will be apparent to one of
ordinary skill in the art in view of the teachings herein.
[0058] With waveguide assembly (450) coupled to transducer assembly
(410), the user may then use the assembled transducer and waveguide
for further assembly of a surgical instrument, or, if the surgical
instrument is fully assembled, the user may utilize the surgical
instrument for a procedure. To decouple waveguide assembly (450)
from transducer assembly (410), the user may simply pull upon
waveguide assembly (450) proximally, activate transducer assembly
(410) and pull upon waveguide assembly (450) proximally, and/or
thermally heat and/or cool waveguide assembly (450) and/or
transducer assembly (410) and pull upon waveguide assembly (450)
proximally. Waveguide assembly (450) may then be disposed of,
cleaned, resterilized, and/or otherwise. Transducer assembly (410)
may be reused, cleaned, reclaimed, and/or otherwise as well. Thus,
a user may dispose of the unclean mechanical components of
waveguide assembly (450) while recycling the electrical components
of transducer assembly (410).
[0059] Of course other configurations for interference fit coupling
mechanism (400) will be apparent to one of ordinary skill in the
art in view of the teachings herein.
[0060] D. Exemplary Ball Joint and Cam Interface
[0061] FIGS. 11-14 depict an exemplary ball joint interface (500)
for coupling a transducer assembly (510) to a waveguide assembly
(550). Referring initially to FIG. 11, transducer assembly (510)
comprises a plurality of piezoelectric elements (512) that are
compressed between a first resonator (514) and a second resonator
(520) to form a stack of piezoelectric elements. Piezoelectric
elements (512) may be fabricated from any suitable material, for
example, lead zirconate-titanate, lead meta-niobate, lead titanate,
and/or any other suitable piezoelectric crystal material.
Transducer assembly (510) further comprises electrodes (not shown),
including at least one positive electrode and at least one negative
electrode, that are configured to create a voltage potential across
piezoelectric elements (512), such that piezoelectric elements
(512) convert the electrical power into ultrasonic vibrations. In
some versions the electrodes are coupled to a power source (not
shown) that is external to a handle assembly (not shown) in which
transducer assembly (510) is contained. In other versions, the
power source may be contained within the handle assembly such that
transducer assembly (510), the handle assembly, and the power
source form a single reusable and/or reclaimable assembly. The
ultrasonic vibrations produced by transmission assembly (510) are
transmittable to a blade (not shown) via waveguide assembly (550),
as will be described below. In the present example, first resonator
(514) comprises a cup feature (530) formed in a distal end of first
resonator (514). As shown in FIG. 12, cup feature (530) comprises a
ball shaft portion (532) (shown in phantom), a ball cup (534)
(shown in phantom), and an arcuate slot portion (536). Ball shaft
portion (532) is a substantially vertical recess sized to receive
ball (564), and ball shaft portion (532) is formed in first
resonator (514) at a distance from a distal face (516) of first
resonator (514) that is substantially equal to the combined length
of shaft (562) and a radius of ball (564) described below. It
should be understood that ball shaft portion (532) may
alternatively be an angled shaft, such as angled ball shaft portion
(576) shown in FIG. 15. Ball shaft portion (532) terminates at the
bottom with ball cup (534) configured to receive a portion of ball
(564) therein. In some versions, ball cup (534) may include detents
(not shown) or other features for ball (564) to snap into ball cup
(534) and be retained therein. Arcuate slot portion (536) is a slot
formed by cutting a sector out of first resonator (514) angularly
spanning from ball shaft portion (532) to a longitudinal axis of
transducer assembly (510). In the example shown, arcuate slot
portion (536) is a 90 degree sector slot sized to permit shaft
(562) to rotate from the vertical to the horizontal through arcuate
slot portion (536); but also sized to prevent ball (564) from
entering arcuate slot portion (536). First resonator (514) of the
present example includes a rounded portion (518) configured to
permit rotation of waveguide assembly (550) about first resonator
(514) while ball (564) is inserted into ball cup (534). In some
versions, rounded portion (518) may also cam waveguide assembly
(550) distally to create an increasingly tight fit as waveguide
assembly (550) is rotated from the vertical to the horizontal. In
addition or in the alternative, ball (564) may be asymmetric or
have a camming portion such that an increasingly tight fit is
created when waveguide assembly (550) is rotated from the vertical
to the horizontal. In the foregoing configuration, rounded portion
(518) need not necessarily cam waveguide assembly (550). Of course
other configurations for transducer assembly (510) will be apparent
to one of ordinary skill in the art in view of the teachings
herein.
[0062] Referring back to FIG. 11, waveguide assembly (550) includes
a waveguide portion (552) and a horn portion (554). In the present
example waveguide portion (552) and horn portion (554) are integral
parts forming a monolithic waveguide assembly (550). It should be
understood that in some versions horn portion (554) and waveguide
portion (552) may also be separable, though this is merely
optional. Of course, it should be understood that horn portion
(554) may be integral with transducer assembly (510) such that
waveguide assembly (550) selectively couples with horn portion
(554). Such coupling of horn portion (554) to waveguide assembly
(550) may incorporate any of the interfaces described herein. In
the present example, horn portion (554) comprises a cylindrical
section having a proximal face (556) and a flared section extending
distally from the cylindrical section. Waveguide portion (552)
comprises an elongate rod extending distally from the flared
section of horn portion (554). In some versions waveguide assembly
(550) may be made from titanium, though it should be understood
that other metals may be used, including steel, aluminium, brass,
etc. Horn portion (554) further comprises a ball connector (560),
shown in FIG. 13. Ball connector (560) comprises a shaft (562) and
a ball (564). Shaft (562) extends proximally from proximal face
(556) of horn portion (554). Ball (564) is formed on a proximal end
of shaft (562) and is configured to be insertable vertically into
ball shaft portion (532) of cup feature (530) when waveguide
assembly (550) is vertically oriented relative to transducer
assembly (510). When ball (564) is so inserted, waveguide assembly
(550) may be rotated to the horizontal axis such that shaft (562)
is rotated through arcuate slot portion (536) to couple waveguide
assembly (550) to transducer assembly (510). In the example shown
in FIG. 11, waveguide assembly (550) is rotated counterclockwise,
though this is merely exemplary. Furthermore, waveguide assembly
(550) may be included in a transmission assembly, such as
transmission assembly (70) described above. Still further
alternative versions for waveguide assembly (550) will be apparent
to one of ordinary skill in the art in view of the teachings
herein. For instance, in the example shown in FIG. 14, shaft (562)
includes a tapered ridge (566) extending from shaft (562) such that
shaft (562) is asymmetric and has a cross-sectional profile shaped
like a teardrop. Accordingly, waveguide assembly (550) may only be
insertable in a single orientation in this example.
[0063] Initially, waveguide assembly (550) and transducer assembly
(510) are decoupled, as shown separately in FIGS. 12-13. To couple
waveguide assembly (550) to transducer assembly (510), the user
orients waveguide assembly (550) vertically and aligns ball
connector (560) with ball shaft portion (532) of cup feature (530).
The user inserts ball (564) into ball cup (534) then rotates
waveguide assembly (550) such that shaft (562) rotates through
arcuate slot portion (536) until waveguide assembly (550) is
longitudinally aligned with transducer assembly (510), thereby
coupling waveguide assembly (550) to transducer assembly (510). The
user may then use the assembled transducer and waveguide for
further assembly of a surgical instrument, or, if the surgical
instrument is fully assembled, the user may utilize the surgical
instrument for a procedure. To decouple waveguide assembly (550)
and transducer assembly (510), the user rotates waveguide assembly
(550) to a vertical position such that the user can lift ball (564)
out of ball cup (534) and out of ball shaft portion (532).
Waveguide assembly (550) may then be disposed of, cleaned,
resterilized, and/or otherwise. Transducer assembly (510) may be
reused, cleaned, reclaimed, and/or otherwise as well. Thus, a user
may dispose of the unclean mechanical components of waveguide
assembly (550) while recycling the electrical components of
transducer assembly (510).
[0064] Of course other configurations for ball joint interface
(500) will be apparent to one of ordinary skill in the art in view
of the teachings herein. For instance, an alternative ball joint
interface (570) is shown in FIG. 15. In the example shown,
transducer assembly (572) includes a notch (574), an angled ball
shaft portion (576) (shown in phantom), ball cup (534), an arcuate
slot portion (not shown), and a cammed distal end (578). The
arcuate slot portion is configured in a substantially similar
manner to arcuate slot portion (536). Waveguide assembly (580) is
configured in a substantially similar manner to waveguide assembly
(550), except waveguide assembly (580) includes a cammed proximal
end (582) that is complementary to cammed distal end (578). In the
present example, the user inserts ball (564) into ball cup (534)
then rotates waveguide assembly (580) to the horizontal axis by
rotating cammed proximal end (582) along cammed distal end (578)
while shaft (562) is guided through arcuate slot portion. Cammed
proximal end (582) and cammed distal end (578) may be configured
such that ball (564) is urged distally against ball cup (534) or
into a pocket (not shown) formed distally of ball cup (534). The
user may then use the assembled transducer and waveguide for
further assembly of a surgical instrument, or, if the surgical
instrument is fully assembled, the user may utilize the surgical
instrument for a procedure. To decouple waveguide assembly (580)
and transducer assembly (572), the user rotates waveguide assembly
(580) to a position such that the user can lift ball (564) out of
ball cup (534) and out of angled ball shaft portion (576).
[0065] While some examples of interfaces for transmission
assemblies and waveguide assemblies have been described herein,
still other interfaces will be apparent to one of ordinary skill in
the art in view of the teachings herein.
[0066] III. Exemplary Gear-Driven Coupling Mechanism
[0067] In some other instances it may be useful to selectively
couple a waveguide to transducer (100) using a mechanism that can
have predetermined characteristics such that the torquing of
transducer (100) onto waveguide may be predictable. Such mechanisms
may enable the implementation of coupling assemblies for transducer
(100) and the waveguide that may be easier to operate, because a
user may simply need to operate the coupling assembly from an
uncoupled position to a coupled position. Alternatively, such
mechanisms with predetermined characteristics may provide a
predictability for torquing transducer (100) onto the waveguide at
a variety of torque values. In addition, such coupling mechanisms
may be included in a separable unit such that transducer (100) may
be reused with the coupling mechanism while the other components
may be disposed of. Accordingly, a merely exemplary gear-driven
coupling mechanism will be described below.
[0068] FIG. 16 depicts a top plan view of an exemplary transducer
unit (600) with a portion of a casing (602) removed to show some of
the internal components therein. In the present example, transducer
unit (600) includes a casing (602), a transducer (610), and a
geared mechanism (620). In the present example, transducer (610)
includes a horn (612) having a distal threaded recess (614) (shown
in phantom) configured to couple with threading (732) on waveguide
(730), described in more detail below and shown in FIGS. 17A-17C.
Transducer (610) also includes a proximal recess (616) (shown in
phantom) coupled to a transducer shaft (630), as will be described
below as well. Transducer (610) is rotatably coupled to casing
(602) via one or more bearing members (not shown) such that
transducer (610) may both translate longitudinally and rotate about
a longitudinal axis of transducer (610) while still being coupled
to casing (602). Casing (602) may further include attachment
features (not shown) such that casing (602) may be coupled to lower
handle portion (700) described below, thought this is merely
optional. Such attachment features may include snap fasteners,
clips, clamps, screws, bolts, interference fittings, latches, etc.
Alternatively, transducer unit (600) may include a slide lock
assembly, such as slide lock assembly (820) described below in
section IV and shown in FIG. 18.
[0069] Geared mechanism (620) of the present example comprises a
transducer shaft (630), a rear bevel gear (640), a support bevel
gear (650), and a main bevel gear (660). Main bevel gear (660) is
fixedly coupled to a pinion gear (670), though it should be
understood that pinion gear (670) and main bevel gear (660) may be
integrally formed to be a single gear. A rack gear (680) is
slidably mounted to a portion (604) of casing (602) via a
longitudinal slot (606) formed in portion (604) and a handle (682)
coupled to a distal end of rack gear (680) located outside of
casing (602). It should be noted that portion (604) is not separate
from casing (602); rather, for ease of viewing and explanation,
portion (604) has been provided as context for slot (606).
Transducer shaft (630) of the present example is insertable into
proximal recess (616) of transducer (610) and is affixed to
transducer (610). Transducer shaft (630) is also fixedly attached
to rear bevel gear (640) such that rotation of rear bevel gear
(640) rotates transducer shaft (630) (and therefore rotates
transducer (610)). Rear bevel gear (640) of the present example is
supported by and rotatable relative to a rear shaft (642) that is
coupled casing (602). In some versions, rear shaft (642) may be
affixed to rear bevel gear (640) and may extend out of casing (602)
such that a manual knob (not shown) may be coupled to rear shaft
(642) to manually rotate rear bevel gear (640) (and, consequently,
transducer (610)). For instance, the manual knob may be provided to
apply a final torque to transducer (610) when coupled to waveguide
(730), or the manual knob may be used to initially break transducer
(610) loose from waveguide (730) when decoupling transducer (610).
Support bevel gear (650) meshes with rear bevel gear (640) to
provide additional alignment and support for rear bevel gear (640).
Support bevel gear (650) is supported by a support shaft (652)
coupled to casing (602). In some versions, support shaft (652) may
be coupled to support bevel gear (650) and may extend out of casing
(602) such that another manual knob (not shown) may be coupled to
support shaft (652) to manually rotate support bevel gear (650)
(and, consequently, transducer (610)). In some versions, support
bevel gear (650) simply acts as an idler gear. It should be
understood that support bevel gear (650) is merely optional and may
be omitted.
[0070] Main bevel gear (660) meshes with rear bevel gear (640) such
that main bevel gear (660) is operable to rotate rear bevel gear
(640). In the present example, main bevel gear (660) is fixedly
coupled to pinion gear (670) such that rotation of pinion gear
(670) rotates main bevel gear (660). Main bevel gear (660) and
pinion gear (670) of the present example are supported by and
rotatable about (or with) a pinion shaft (672) that is coupled
casing (602). Rack gear (680) meshes with pinion gear (670) such
that the linear motion of rack gear (680) is converted into
rotation of pinion gear (670). In the present example, rack gear
(680) is a flexible or semi-rigid member such that rack gear (680)
may be bent into portions of lower handle portion (700) when
transducer unit (600) is coupled thereto and rack gear (680) is in
the uncoupled position. In some versions, rack gear (680) may
instead be a rigid member that extends out an aperture in casing
(602) when rack gear (680) is in an uncoupled position. A handle
(682) is coupled to the distal end of rack gear (680) and is
located on the outside of casing (602). Handle (682) of the present
example is coupled to a shaft (not shown) at the distal end of rack
gear (680) that is insertable through slot (606). Accordingly, with
handle (682) located on the exterior of casing (602), a user may
operate rack gear (680) within casing (602) simply by grasping
handle (682) and actuating handle (682) longitudinally along slot
(606). In some versions, slot (606) may have a proximal end
defining an uncoupled position and a distal end defining a coupled
position, as will be described in more detail below. Slot (606) may
further include visual markings (not shown) indicating the
uncoupled and coupled positions and/or various positional
indicators along slot (606) indicating the rotational positions
and/or torques applied to transducer (610) via transducer shaft
(630). Of course other configurations for transducer unit (600)
will be apparent to one of ordinary skill in the art in view of the
teachings herein.
[0071] Referring now to FIG. 17A, transducer unit (600) is
initially decoupled from a lower handle portion (700). Lower handle
portion (700) includes a casing (702), a pair of toggle buttons
(710), a rotation knob (720), a waveguide (730), and a trigger
(740) pivotally mounted to lower handle portion (700). Casing
(702), toggle buttons (710), rotation knob (720), and/or trigger
(740) may be configured in accordance with at least some of the
teachings of casing (61), the toggle buttons, rotation knob (66),
and/or trigger (68) described above or in accordance with U.S. Pat.
Pub. No. 2006/0079874; U.S. Pat. Pub. No. 2007/0191713; U.S. Pat.
Pub. No. 2007/0282333; U.S. Pat. Pub. No. 2008/0200940; U.S. Pat.
Pub. No. 2011/0015660; U.S. Pat. No. 6,500,176; U.S. Pat. Pub. No.
2011/0087218; and/or U.S. Pat. Pub. No. 2009/0143797. Casing (702)
may further include attachment features (not shown) complementary
to those of casing (602) such that casings (602, 702) may be
coupled together, thought this is merely optional. Such attachment
features may include snap fasteners, clips, clamps, screws, bolts,
interference fittings, latches, etc. Alternatively, lower handle
portion (700) may include slider recesses, such as slider recesses
(854) described below in section IV and shown in FIG. 18. In the
present example, waveguide (730) is slidable relative to rotation
knob (720) with a portion of waveguide (730) extending distally
from lower handle portion (700). In the present example, waveguide
(730) is slidable relative to rotation knob (720) to permit
waveguide (730) to screw into transducer (610), though this is
merely optional. In some versions waveguide (730) may be affixed to
rotation knob (720) and transducer (610) is slidable relative to
casing (602). A proximal end of the present exemplary waveguide
(730) extends proximally into casing (702) of lower handle assembly
(700) and includes threading (732) configured to threadably couple
to distal threaded recess (614) of transducer (610). An end
effector (not shown), such as end effector (80), is coupled to a
distal end of the waveguide (730) and is operable to simultaneously
sever tissue and vaporize adjacent tissue cells, thereby providing
a cauterizing effect with relatively little thermal spread. In the
present example, rotation knob (720) may be selectively coupleable
to waveguide (730) such that rotation knob (720) is operable to
rotate waveguide (730). Waveguide (730) may further be included in
a transmission assembly (not shown), such as transmission assembly
(70) described above. For instance, waveguide (730) may be within
an inner tubular actuating member and an outer sheath, with the
sheath being coupled with rotating knob (720). In some versions,
waveguide (730) may be decoupleable from lower handle portion
(700). Examples of such decoupleable waveguides are described in
U.S. Patent Application Serial No. [Attorney Docket No.
END6895USNP7.0587794], entitled "Surgical Instrument with Modular
Shaft and End Effector," the disclosure of which is incorporated by
reference herein.
[0072] FIGS. 17A-17C depict a sequence showing the coupling of
transducer (610) to waveguide (730) via a gear-driven coupling
mechanism. FIG. 17A shows an initial configuration with transducer
unit (600) and lower handle portion (700) decoupled and handle
(682) of rack gear (680) shown in an uncoupled proximal position.
Transducer unit (600) is subsequently lowered onto lower handle
assembly (700) to align threading (732) of waveguide (730) with
distal threaded recess (614) (shown in phantom) of transducer (610)
as shown in FIG. 17B. In the present example, flexible rack gear
(680) bends to fit within casing (702) of lower handle portion
(700). In some versions, as discussed above, transducer unit (600)
may be mechanically coupled to lower handle portion (700) via snap
fasteners, clips, clamps, screws, bolts, interference fittings,
latches, etc., though this is merely optional.
[0073] The user then actuates handle (682) distally along slot
(606) of transducer unit (610). Handle (682), being coupled to rack
gear (680), actuates rack gear (680) and engages the teeth of rack
gear (680) with the teeth of pinion gear (670). Pinion gear (670)
converts the linear motion of rack gear (680) into rotation. Since
pinion gear (670) is fixedly coupled to main bevel gear (660), the
rotation of pinion gear (670) also rotates main bevel gear (660).
Main bevel gear (660) meshes with rear bevel gear (640) to rotate
rear bevel gear (640). Support bevel gear (650), if included, may
also rotate due to the rotation of rear bevel gear (640). Rear
bevel gear (640) rotates transducer shaft (630), thereby threadably
engaging distal threaded recess (614) of transducer (610) with
threading (732) of waveguide (730). Waveguide (730) may then be
slid proximally to torque into transducer (610). Of course, as
noted above, in some versions transducer (610) may be slid distally
such that distal threaded recess (614) engages threading (732)
while waveguide (730) remains stationary. In some versions
translation of handle (682) to the distal end of slot (606), as
shown in FIG. 17C, may apply a predetermined number of rotations to
transducer (610) to sufficiently torque transducer (610) to
waveguide (730). By way of example only, transducer (610) may
engage waveguide (730) for a predetermined number of rotations such
that a torque of approximately 5 to 15 in-lbs. is formed. Of course
other torque values may be used as well. In other versions, handle
(682) may only need to be actuated partially along slot (606) to
adequately torque transducer (610) onto waveguide (730). In such a
version, various waveguides (730) and/or waveguides (730) with
different threading (732) tolerances may be used with transducer
unit (610) with little, if any, modification.
[0074] With transducer (610) coupled to waveguide (730), the user
may then use the surgical instrument for a procedure. To decouple
waveguide (730) from transducer (610), the user actuates handle
(682) proximally, thereby engaging geared mechanism (620) to
threadably disengage transducer (610) from waveguide (730). In
addition or in the alternative, a second handle (not shown) may be
coupled to the proximal end of rack gear (680) and extend through
casing (702) and/or casing (602). Accordingly, the user may grasp
this second handle and actuate the second handle upwardly and/or
distally to engage geared mechanism (620) and threadably disengage
transducer (610) from waveguide (730). As noted previously, a
manual knob may be provided to initially break the torque
connection between transducer (610) and waveguide (730). In some
instances, the user may grasp rotation knob (720) to provide a
counter torque when handle (682) is actuated proximally. Waveguide
(730) and/or lower handle portion (700) may then be disposed of,
cleaned, resterilized, and/or otherwise. Transducer unit (600) may
be reused, cleaned, reclaimed, and/or otherwise as well. Thus, a
user may dispose of the unclean mechanical components of waveguide
(730) and/or lower handle portion (700) while recycling the
electrical components of transducer unit (600). In some versions, a
power unit may be within transducer unit (600) or within lower
handle portion (700) for a portable surgical instrument. In other
versions, transducer unit (600) may be coupled to a power source
via a cable.
[0075] Of course other configurations for a gear-driven coupling
mechanism will be apparent to one of ordinary skill in the art in
view of the teachings herein. For instance, horn (612) and proximal
end of waveguide (730) may be constructed in accordance with at
least some of the teachings for waveguide assemblies (350, 380) and
transducer assemblies (310, 370), shown in FIGS. 5-9.
Alternatively, distal threaded recess (614) may omit the threading
and waveguide (730) may omit threading (732). Proximal recess (616)
may instead comprise threading and transducer shaft (630) may
include threading complementary to the threading of proximal recess
(616). In such a configuration, rotation of rear bevel gear (640)
translates transducer (610) distally on the threading of transducer
shaft (630), thereby compressively coupling transducer (610) to
waveguide (730). The preceding configuration may be further
modified such that horn (612) and proximal end of waveguide (730)
may be constructed in accordance with at least some of the
teachings for waveguide assembly (450) and transducer assembly
(410), shown in FIG. 10. In other versions, a motor (not shown) may
be operably coupled to geared mechanism (620). Still other versions
will be apparent to one of ordinary skill in the art in view of the
teachings herein.
[0076] IV. Exemplary Handle Assembly and Transducer Unit Slide
Lock
[0077] In some instances it may be useful to selectively couple
transducer unit (600) to lower handle portion (700). For instance,
in some situations it may desirable to include the electrical
components within a reusable transducer unit (600) while including
only disposable mechanical components within lower handle portion
(700). Such mechanical components may be rendered unclean during a
procedure and may not be reusable. Accordingly, an exemplary slide
lock assembly for coupling a transducer unit (600) to lower handle
assembly (700) will be described below.
[0078] FIG. 18 shows an exemplary transducer unit (800) comprising
a casing (810) and a slide lock assembly (820). It should be
understood that a mirrored slide lock assembly (820) identical to
the one shown in FIG. 18 may be included on the opposite side of
transducer unit (800). Transducer unit (800) may be further
configured in accordance with the teachings of transducer unit
(700). Alternatively, transducer unit (800) may include a
transducer (not shown) configured in accordance with one of the
foregoing interfaces, as described in section II of the present
disclosure. By way of example only, transducer unit (800) may
include a transducer configured in accordance with the teachings
for V-shaped slot interface (200) and configured to couple to a
waveguide included in transmission assembly (880) of lower handle
portion (850) described below.
[0079] Slide lock assembly (820) of the present example comprises a
handle (822), a body member (824) (shown in phantom), and a pair of
ledged sliders (826). In the present example, handle (822) extends
out through a slot in the top of casing (810), though it should be
understood that handle (822) may extend out a side, the front, or
the rear of casing (810). In some versions slide lock assembly
(820) may be adapted to be coupled to rack gear (680) and handle
(682) such that actuation of handle (822) both locks transducer
unit (800) to lower handle portion (850) and torques a transducer
to a waveguide. In the present example, body member (824) couples
handle (822) to the pair of ledged sliders (826). Ledged sliders
(826) are L-shaped members each with a ledge (828) extending
outwardly toward the side of casing (810). It should be understood
that ledged sliders (826) may have other configurations, including
slidable cylindrical pins, resilient clamp members configured to
clamp onto cylindrical pins within lower handle portion (850),
and/or any other configuration as will be apparent to one of
ordinary skill in the art in view of the teachings herein.
[0080] Lower handle portion (850) of the present example comprises
a casing (852), a pair of toggle buttons (860), a rotation knob
(870), a transmission assembly (880), and a trigger (890) pivotally
mounted to lower handle portion (850). Casing (852), toggle buttons
(860), rotation knob (870), transmission assembly (880), and/or
trigger (890) may be configured in accordance with at least some of
the teachings of casing (61), the toggle buttons, rotation knob
(66), transmission assembly (70), and/or trigger (68) described
above or in accordance with U.S. Pat. Pub. No. 2006/0079874; U.S.
Pat. Pub. No. 2007/0191713; U.S. Pat. Pub. No. 2007/0282333; U.S.
Pat. Pub. No. 2008/0200940; U.S. Pat. Pub. No. 2011/0015660; U.S.
Pat. No. 6,500,176; U.S. Pat. Pub. No. 2011/0087218; and/or U.S.
Pat. Pub. No. 2009/0143797. In the present example, casing (852)
comprises a pair of slider recesses (854) formed in the inside of
the side casing (852). It should be understood that a mirrored pair
of slider recesses (854) identical to those shown in FIG. 18 may be
included on the opposite side of casing (852). In the present
example, each slider recess (854) comprises an entrance portion
(856) and a ledge portion (858). Entrance portion (856) extends
vertically out of casing (852) and has a longitudinal dimension
sufficient to receive a ledged slider (826) therein. Ledge portion
(858) of the present example extends proximally from entrance
portion (856) and has a vertical dimension sized to receive the
ledge (828) of ledged slider (826) therein. Ledge portion (858) may
proximally extend from entrance portion for a distance less than,
equal to, or more than the longitudinal length of ledge (828).
Still other configurations for slider recesses (854) will be
apparent to one of ordinary skill in the art in view of the
teachings herein. For instance, ledge portions (858) of slider
recesses (854) may be ramped downwardly to urge ledges (828)
downwardly, thereby further tightening transducer unit (800) to
lower handle portion (850). In another arrangement, slider recesses
(854) may omit entrance portion (856) and only include the ramped
ledge portions (858) previously described.
[0081] When a user desires to couple transducer unit (800) to lower
handle portion (850), initially ledged sliders (826) are aligned
with entrance portions (856). Transducer unit (800) is then lowered
onto lower handle portion (850) such that ledges (828) are
longitudinally aligned with ledge portions (858). The user then
actuates handle (822) proximally to slide ledges (828) of ledged
sliders (826) into ledge portions (858), thereby coupling
transducer unit (800) to lower handle portion (850). The user may
then use the assembled surgical instrument for a procedure. When a
user desires to decouple transducer unit (800) from lower handle
portion (850), the user actuates handle (822) distally until ledges
(828) are vertically clear of ledge portions (858). The user may
then lift transducer unit (800) off of lower handle portion (850).
Lower handle portion (850) may then be disposed of, cleaned,
resterilized, and/or otherwise. Transducer unit (800) may be
reused, cleaned, reclaimed, and/or otherwise as well. Thus, a user
may dispose of the unclean mechanical components of lower handle
portion (850) while recycling or reusing the components of
transducer unit (800). In some versions, a power unit may be within
transducer unit (800) for a portable surgical instrument. In other
versions, transducer unit (800) may be coupled to a power source
via a cable.
[0082] Of course other configurations for a slide lock assembly
will be apparent to one of ordinary skill in the art in view of the
teachings herein. For instance, slider recesses (854) may include
one or more detents to selectively hold slide lock assembly (820)
in the proximal position.
[0083] It should be appreciated that any patent, publication, or
other disclosure material, in whole or in part, that is said to be
incorporated by reference herein is incorporated herein only to the
extent that the incorporated material does not conflict with
existing definitions, statements, or other disclosure material set
forth in this disclosure. As such, and to the extent necessary, the
disclosure as explicitly set forth herein supersedes any
conflicting material incorporated herein by reference. Any
material, or portion thereof, that is said to be incorporated by
reference herein, but which conflicts with existing definitions,
statements, or other disclosure material set forth herein will only
be incorporated to the extent that no conflict arises between that
incorporated material and the existing disclosure material.
[0084] Embodiments of the present invention have application in
conventional endoscopic and open surgical instrumentation as well
as application in robotic-assisted surgery.
[0085] Embodiments of the devices disclosed herein can be
reconditioned for reuse after at least one use. Reconditioning may
include any combination of the steps of disassembly of the device,
followed by cleaning or replacement of particular pieces, and
subsequent reassembly. In particular, embodiments of the devices
disclosed herein may be disassembled, and any number of the
particular pieces or parts of the devices may be selectively
replaced or removed in any combination. Upon cleaning and/or
replacement of particular parts, embodiments of the devices may be
reassembled for subsequent use either at a reconditioning facility,
or by a surgical team immediately prior to a surgical procedure.
Those skilled in the art will appreciate that reconditioning of a
device may utilize a variety of techniques for disassembly,
cleaning/replacement, and reassembly. Use of such techniques, and
the resulting reconditioned device, are all within the scope of the
present application.
[0086] By way of example only, embodiments described herein may be
processed before surgery. First, a new or used instrument may be
obtained and if necessary cleaned. The instrument may then be
sterilized. In one sterilization technique, the instrument is
placed in a closed and sealed container, such as a plastic or TYVEK
bag. The container and instrument may then be placed in a field of
radiation that can penetrate the container, such as gamma
radiation, x-rays, or high-energy electrons. The radiation may kill
bacteria on the instrument and in the container. The sterilized
instrument may then be stored in the sterile container. The sealed
container may keep the instrument sterile until it is opened in a
medical facility. A device may also be sterilized using any other
technique known in the art, including but not limited to beta or
gamma radiation, ethylene oxide, or steam.
[0087] Having shown and described various embodiments of the
present invention, further adaptations of the methods and systems
described herein may be accomplished by appropriate modifications
by one of ordinary skill in the art without departing from the
scope of the present invention. Several of such potential
modifications have been mentioned, and others will be apparent to
those skilled in the art. For instance, the examples, embodiments,
geometrics, materials, dimensions, ratios, steps, and the like
discussed above are illustrative and are not required. Accordingly,
the scope of the present invention should be considered in terms of
the following claims and is understood not to be limited to the
details of structure and operation shown and described in the
specification and drawings.
* * * * *